Throughout the 1970s and early 1980s, the TULF was frequently blamed by nationalist Sinhalese politicians for acts of violence committed by militant groups such as the Liberation Tigers of Tamil Eelam (LTTE).

In fact, the TULF represented an older, more moderate generation of Tamils that felt independence could be achieved without violence, unlike the LTTE, who believed in armed conflict.

In October 1983, all the TULF legislators, numbering sixteen at the time, forfeited their seats in Parliament for refusing to swear an oath unconditionally renouncing support for a separate state in accordance with the Sixth Amendment to the Constitution of Sri Lanka.

Votes and seats won by the TULF by electoral district In the 2000 Sri Lankan parliamentary election, in which the People's Alliance, led by Ratnasiri Wickremanayake, retained power, the TULF won 1.23% of the popular vote and 5 out of 225 seats in the Sri Lankan parliament.

Votes and seats won by the TULF by electoral district In the 2010 Sri Lankan parliamentary election, in which the United People's Freedom Alliance, led by Mahinda Rajapaksa, retained power, the TULF led, by V. Anandasangaree, won 0.11% of the popular vote and no seats in the Sri Lankan parliament.